(a)[2]
Draw a labelled diagram to illustrate the bonding in copper.
(b)[2]
Explain the reason metals are malleable.
(c(i))[2]
Copper rusts slowly in moist air. One of the corrosion products is $\text{CuCO}_3.\text{Cu(OH)}_2$. Calculate the percentage by mass of copper in this compound.
(c(ii))[2]
How could you demonstrate that $\text{CuCO}_3.\text{Cu(OH)}_2$ contains carbonate ions?
(d)[2]
Copper is oxidised by concentrated sulfuric acid. The redox reaction may be written as equations A and B. A $\text{Cu} \rightarrow \text{Cu}^{2+} + 2\text{e}^-$ B $4\text{H}^+ + \text{SO}_4^{2-} + 2\text{e}^- \rightarrow 2\text{H}_2\text{O} + \text{SO}_2$ Which reaction, A or B, is oxidation and which is reduction? Give your reason.